Machine for grinding and polishing cultivator-disks and rolling colters.



' PATENTBD SEPT. 19, 1905. k c. YOUNGSTROM. MACHINE FOR GRINDING ANDAPOLISHING GULTIVATOR n ISKS AND ROLLING COLTERS. APPLIOATION FILED AWL-1.1904.

2 SHEETS-SHEET 1.

7 amt-[Masses N0. 799,700. PATENTED SEPT. 19, 1905.

' C. YOUNGSTROM. MACHINE FOR GRINDING AND POLISHING GULTIVATOR DISKS AND ROLLING COLTERS. APPLIOATION FILED AUG.4,1904.

2 SHBETSSHEET 2.

54M.) c-wtoz WWI L em as atliozuel UNITED STATES CARL YOUNGSTROM, OF MEOKLING, SOUTH DAKOTA, ASSIGNOR OF ONE- PATENT OFFICE.

HALF TO ERIK B. ERIKSON, OF MECKLING, SOUTH DAKOTA.

MACHINE FOR GRINDING AND POLISHING CULTIVATOR-DISKS AND ROLLING COLTERS.

Specification of Letters Patent.

Patented Sept. 19, 1905.

Application filed August 4, 1904. Serial No. 219,495.

. all whom! it may concern:

Be it known that I, CARL YOUNGSTROM, a citizen of the United States, residing at Meekling, in the county of Clay and State of South Dakota, have invented a new and useful Machine for Grinding and Polishing Cultivator- Disks and Rolling Uolters, of which the following is a specification.

The invention relates to improvements in machines for grinding and polishing cultivator-disks and rolling colters.

The object of the present invention is to improve the construction of machines for grinding and polishing cultivator-disks and to provide a simple, inexpensive, and efiicient one adapted to hold a disk against an emery or other grinding wheel in proper position for sharpening or polishing the same.

A further object of the invention is to provide a machine of this character adapted to be automatically operated 'or actuated by the rotation of the grinding and polishing Wheel and capable of ready adjustment to arrange a disk or colter in proper position with relation to the grinding and polishing wheel to secure the desired cutting or polishing action and to grind the cutting edge at the desired bevel.

The invention also has for its object to provide a machine which will enablea disk to be ground in full view of the operator and which will also enable the grinding operation to be controlled by hand, whereby when the grindingor polishing operation is nearly completed any parts or spots requiring additional grinding or polishing may be readily led to and held against the grindingand polishing wheel.

With these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion, size, and minor details of construction within the scope of the claims may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a side elevation of a disk grinding and polishing machine constructed in accordance with this invention. Fig. 2 is a plan view. Fig. 3 is a transverse sectional view taken substantially on the line 3 3 of Fig. 1. Fig. 4 is a longitudinal sectional view of one end of the machine. Fig.5

is a side elevation of a portion of the machine, illustrating the arrangement of the parts for polishing adisk. Fig. 6 is an enlarged detail sectional view illustrating the construction of the friction device for retarding the rota tion of the fly-wheel for controlling the grinding and polishing action. Fig. 7 is a detail sectional view illustrating the construction for securing a disk to the front end of the longitudinal shaft. Fig. 8 is a detail view illustrating the construction of a swiveled support for the adjusting-screw of the laterally-swinging section or member.

Like numerals of reference designate corresponding parts in all the figures of the drawings.

1 designates a supporting-frame provided with legs 2 and having side bars 3, secured to the upper ends of the legs and connected by transverse end bars 4, suitably secured to the side bars at the terminals thereof. The top of the frame is also provided with a diagonal brace 5, extending from one end of the frame to the other for retaining the side and end bars in their parallelism. The supporting-frame is provided with transverse guiderods 6, constructed of tubular metal and receiving a laterally,slidable section or member 7, which is provided with eyes or sleeves 8. arranged in pairs and suitably secured to the lower face of the said laterally-slidable section or member. The section or member 7, which extends longitudinally of the machine, has its upper face arranged in the same horizontal plane as the upper faces of the side bars 3 of the supporting-frame, and it is shifted laterally by means of a transverselydisposed adjusting-screw 9, ex tending entirely across the supporting-frame and engaging a nut 10 of the section or member 7. The nut 10 is provided with a shank 11, secured in a perforation 12 of the laterally-slidable section or member 7. One end of the adjustingscrew 9 is extended beyond the supporting frame and is provided with a crank-handle, and the other end is provided at the inner and outer faces of the adjacent side bar 'with collars 13, suitably secured to the screw and adapted to prevent the same from moving longitudinally in the bearing-openings of the sides of the supporting-frame. By this construction the adjusting-screw is swiveled to the supporting-frame; but any other suitable means may be provided for journaling the screw on the frame and for holding the former against longitudinal movement on the latter. The laterally movable section or member is provided atone side with a brace 14, which issubstantially V-shapcd, being composed of two sides disposed at an angle and suitably secured to the laterally-shiftable section or member. The V-shaped brace, which projects laterally from one side of the section or member 7 is provided at its apex with an eye or opening 15 to receive the adjusting-screw, whereby the brace is guided thereon. This brace assists in maintaining the section or member 7 in its parallel relation with the sides of the supporting-frame. When the adjusting-screw is turned in one direction, the section or member will be moved in one direction, and a reverse rotation of the adjusting-screw will move the section 7 in the opposite direction.

Mounted upon the laterally-shiftable section or member 7 is a pivotally-mounted horizontally-adjustable section 16, connected at its front end by a vertical screw 17 to the front end of the laterally-slidable section 7; but any other suitable means may be employed for pivoting the laterally-swinging section 16 to the laterally-slidable section 7. The rear portion of the laterally-swinging section is supported by an arcuate bar 18, extending across the supporting-frame and secured to the upper face of the side bars thereof. The laterally-swinging frame is provided with a curved groove 19 to receive the arcuate bar 18. The adjustment of the laterally-swinging section or member is effected by means of a transversely-disposed adjusting-screw 20, connected at its outer portion with a swiveled support or hearing 21 and engaging a nut 22 of the section or member 16. The nutis provided with a threaded shank, which is secured in a perforation of the section or member 16. The screw 20, which is provided at one end with a crank-handle, has a pair of annular flanges or collars 23, which are lo cated at the inner and outer sides of the swiveled support 21. This support 21, which has an open bearing, is provided with a depending shank 24, which is fitted in a sleeve or socket 25, preferably formed integral with the brace 14:; but any other suitable means may be provided for swiveling the support 21. The shank of the nut 22 is adapted to rotate in the perforation of the laterally-swinging section or member to accommodate itself to the position of the adjusting-screw. The adjusting-screw 20 is arranged in a transverse recess 16 of the section or member 16'to permit the necessary swinging movement of the screw incident to the movement of the section or member 16 on its pivot 17 The laterally-swinging section or member supports a longitudinally-slidable section or member 26, which is operated by a lever 27, f ulcrumed at its lower end 28 on the laterallyswinging section or member'and connected by a link 29 with the longitudinally-slidable section or member. The link 29 is pivoted at its ends, as clearly illustrated in Fig. 1 of the drawings, and when the lever is oscillated the section or member 26 will be moved longitudinally. The rear end of the longitudinally-sl-idable section or member is guided by leaves or plates 30, which are secured to the vertically-swinging section or member 31 and which are pivoted to the longitudinally-slidable section or member 26 by suitable pivots or pintles 32. These leaves or plates hinge the vertically-swinging section or member to the longitudinally-slidab'le section or member, and they are extended below the upper face of the laterally-swinging section or member to form guides. These leaves or plates are curved, as shown; but they may be of any other desired form, as will be readily understood. The front end of the longitudinally-slidable section or member is guided by a pair of approximately L-shaped resilient guides or plates 33, consisting of horizontal and vertical portions, the horizontal portions being secured to the side faces of the longitudinally-slidable section or member and the vertical portions depending below'the said longitudinally-slidable section or member and arranged to engage the side faces of the laterally-swinging section or member. The resilient guides 33 are connected by a rod 34, having a threaded portion which is engaged by a clamping-nut 35, whereby the guides are caused to firmly clamp the side faces of the laterally-swinging section or member for securing the longitudinal'ly-slidable section or member in its adjustment.

The vertically-swinging section or member 31 is adjustably supported at its front end by an adjusting-screw 36, having its upper end secured in a socket 37 and its lower end guided in a bearing 38, having an opening extending entirely through it to provide a passage for the adjusting-screw. The adjusting-screw is engaged by a hand-wheel 39, having a central threaded nut and adapted to rest upon the lower guide or bearing. These guides or bearings are fitted in suitable recesses of the sections or members 26 and 31, and the sections or members 16 and 26 are provided with suitable slots to accommodate the screw and permit the longitudinal adjustment of the section or member 26. By rotating the hand-wheel the vertically-swinging section is raised or lowered according to the direction in which the hand-wheel is turned. The upper socket or head '37 of the screw and the lower bearing 38 are removable from the sections or members 31 and 26 to permit the vertically-swinging section or member to be arranged in a horizontal position on the longitudinally-slidable section or member, as illustrated in Fig. 5 of the drawings, to adapt the machine for polishing a rolling colter. as hereinafter explained.

The vertically-swinging section or member is provided with bearings 40,41,and 42, located at, the front and rear ends and at the center f the section or member 31 for supporting a disk-holding shaft 43. The disk-holding shaft 43, which is squared or other non-circular shape in cross-section, is provided at the bearings with bushings 44, provided with of the wheel and the disk.

square openings to receive the shaft, having rounded exteriors to fit in the bearings. The bushings are provided with heads, arranged as shown in Fig. l of the drawings, for engaging the bearings. The front end of the disk-holding shaft is provided with a substantially cup-shaped head 45, consisting of acasting, and adapted to receive disk-hubs of different sizes. The shaft extends through the disk 46, which is secured on the shaft by a nut 47, which engages suitable screw-threads of the shaft.

The longitudinal shaft 43, which is endwise movable, is engaged by a coiled spring 48 for yieldably holding the disk 46 in engagement with a grinding and polishing wheel 49 of emery or other suitable material. The grinding and polishing wheel, which may be driven by any suitable means, is arranged vertically, being mounted on a horizontal shaft, as clearly shown in Fig. 1 of the drawings. The coiled spring, which is located on the rear portion of the shaft, is interposed between the rear bushing and an adjustable collar 50, which is provided with a clamping-screw and which is movable on the shaft for varying the tension of the spring to secure the necessary frictional engagement between the disk and the grinding and polishing wheel.

The disk 46 is rotated by'the grinding and polishing wheel, which engages the disk eccentrically or at a point between the vertical diameter of the disk and the side of the same, and the grinding or' polishing action of the wheel 49 varies with the difference in the speed When the grinding and polishing wheel engages the disk near the center or near a point adjacent to the perpendicular diameter of the disk, the speed of the latter will be relatively slow and the grinding or polishing action will be relatively great, and as the distance between the verti- In order to control the'g'rinding and-;polish' ing action of the wheel 49, both manually and automatically, a combined "fly-and brake wheel 51.is provided and is, connected by gears with the longitiidinaldisk holding shaft. The combined fly and-brake wheel 51 is mounted on a stub-shaft 52 and is provided with a pinion 53, which meshes with a gear wheel 54. Bevel-gears are preferably provided, as clearly illustrated in Fig. 1 of the drawings, and the gear 54 is provided with an elongated hub or sleeve 55, which extends beyond the fly or brake wheel to the front and central bearings 40 and 42. The rim or periphery of the wheel 51 is engaged by a friction device consisting of a spring-actuated shoe 56, having a stem 57, which is guided in a sleeve 58, a spring 59 being interposed between the shoe and theadjacent end of the sleeve. The rear end of the stem or shank of the shoe is threaded to receive an adjusting-nut 60, which limits the forward movement of the shoe, whereby the pressure of the same on the combined fly and brake wheel is controlled.

When the machine is employed for sharpening cultivator-disks, the sections or members are adjusted, as before described, to position the disk properly with relation to the grinding-wheel 49, the disk being set at an inclination to bevel the preferred cutting edge. The disk is adjusted laterally for causing the grinding-wheel to engage its periphery the desired distance from the perpendicular diameter of the same to secure the desired speed and the proper grinding action, which may be controlled by such adjustment. Motion will be imparted to the disk from the rotary grinding device, and the sharpening operation will be automatic after the parts have been adjusted. The grinding operation is effected in full view of the operator, and when the same is nearly completed any spots or portions requiring additional grinding may be readily led to the wheel 49 by placing the finger on the combined fly and brake wheel and rotating the same. In this manner any spots or portions may be led to the grinding-wheel and may be held in engagement with the same until properly ground. When'the machine is used for polishing disks or rolling colters having the hubs riveted to them, the upright adjustingscrew is removed and the vertically-swinging section or member is lowered to a horizontal position, the parts being arranged substantially as illustrated in Fig. 5 of the drawings.

The wheel 49 engages the concaved face of the-disk 61, the center of the disk and the center of the grinding-wheel being in practice in adjacent horizontal planes. When polishing the disk adjacent to the hub or center, the grinding action of the wheel 49 will be considerable and the disk will revolve slowly; but as the distance from the center of the disk increases the speed of the latter will increase, and the grinding action will be correspondingly diminished. The friction device may then be advantageously employed and may be adjusted for producing the desired grinding and polishing action at the periphery of the disk and at points adjacent to the same.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is

1. In a machine of the class described, the

combination witha rotary grinding device, of means for supporting a disk in engagement with the rotary grinding member for causing the disk to be rotated, and means for controlling the rotation-of the disk, whereby the grinding thereof is controlled.

2. In a machine of the class described, the combination with a rotary grinding device, of means for supporting a disk in engagement with the rotary grinding member for causing the disk to be rotated, and means for automatically controlling the speed of the disk, relative to that of the grinding device.

3. In a machine of the class described, the combination with a rotary grinding device, of means for supporting a disk in engagement with the rotary grinding member for causing the disk to be rotated, and means for manually and automatically controlling the rotation of the disk.

4. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, and means for controlling the rotation of the disk-holding means for regulating the grinding action of the said device.

5. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, and means for adjusting one of the said parts with relation to the other for causing the grinding device to engage a disk at diiferent points between the center and periphery thereof for controlling the relative speed of the disk.

6. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, and means for adjusting the said disk-holding means with relation to the rotary grinding device for causing the latter to engage a disk at diflerent points between the center and periphery thereof, whereby the speed and grinding action are controlled.

7. In a machine of the class described, the

combination with a rotary grinding device, of

rotary disk-holding means actuated by the grinding device, a wheel for governing the rotation of the disk-holding means, and gearing connecting the wheel with the said means.

8. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, a rotary element connected with the said means, and a friction device engaging the rotary element for controlling the speed of the disk-holding means.

9. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, a rotary element connected with the said means, and an adjustable springactuated friction device engaging the said rotary element.

10. In a machine of theclass described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, a combined brake and fly wheel, gearing connecting the wheel with the said means, and an adjustable friction device arranged to engage the wheel.

11. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device, a combined brake and fly wheel connected with the said means, and a friction device comprising a guide, a brakeshoe arranged to engage the wheel and having a stem slidable in the guide, a spring for holding the brake-shoe in engagement with the wheel, and an adjusting device for controlling the movement of the shoe.

12. In a machine of the class described, the combination with a rotary grinding device, of rotary disk-holding means actuated by the grinding device and arranged to support a disk in an upright position in engagement with the grinding device, and means for controlling the rotation of the disk holding means.

13. In a machine of the class described, the combination of an adjustable support provided with bearings, an endwise-movable shaft having bushings arranged in the bearings, a stubshaft mounted on the support and arranged at right angles to the said shaft, a wheel mounted on the stub-shaft, a gear arranged on the endwise-movable shaft and having a sleeve extended beyond the said wheel, a pinion car ried by the wheel and meshing with the said gear, a friction device for engaging the wheel, and a spring for actuating the endwise-movable shaft for holding a disk yieldably in engagement with a grinding device.

14. In a machine of the class described, the combination with a rotary grinding device, of disk-holding means actuated by the grinding device, and supporting means embodying laterally and longitudinally slidable members and vertically and horizontally swinging members.

15. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a horizontallyswinging member, and a vertically-swinging member mounted on and carried by the horizontally-swinging member and carrying the disk-holding means.

16. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a horizontally-slidable member, a horizontally-swinging member mounted on and carried by the slidable member, and a vertically-swinging member carried by the horizontally-swinging member and carrying the disk-holding means.

17. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a horizontally-slidswinging member to lie in a horizontal position.

19. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a vertically-movable member, and detachable adjusting means comprising a screw, an'upper socket engaging the said member and receiving the upper end I of the screw, a lower guide having an opening through WhlCh the screw passes, and a nut arranged on the guide and engaging the threads of the screw.

20. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a slidable member, means for moving the same, and clamping means for holding the slidable member in its adjustment, the said clamping means also forming a guide for the slidable member.

21. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a slidable member, means for moving the same, guides for the slidable member, and means for adjusting the guides for clamping the slidable member.

22. In a machine of the class described, the combination with disk-holding means, of a slidable member, a vertically-swinging member supported by the slidable member, and leaves or plates hinging the swinging member to the slidable member and extended beyond the latter to form guides.

23. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a slidable member, a vertically-swinging member supported by the slidable'member, leaves or plates arranged at the back of the vertically-swinging member and hinging the same to the slidable member and extended beyond the latter to form guides, front guides for the slidable member, and means for adjusting the front guides to clamp the slidable member in its adjustment.

24. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a slidable member, resilient guides fixed to and extending beyond the slidable member, and adjusting means connecting the guides for clamping the slidable member in its adjustment.

25. In a machine of the class described, the

combination with disk-holding means, of supporting means embodying a horizontallyswinging member, a pivotal nut mounted on the swinging member, a swiveled support,

and an adjusting-screw mounted in the swiveled support and engaging the nut.

26. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a frame,a laterallyslidable member guided by the frame, a horizontally-swinging member mounted on the laterally slidable member, and adjusting means for the said member, the adjusting means of the horizontally-swinging member being carried by the laterally-slidable member and being mounted for independent pivotal movement.

27. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a frame,a laterallyslidable member guided by the frame, a horizontally-swinging member mounted on the laterally-slidable member, supporting means embodying aframe, a slidable member mounted on the frame, an adjusting-screw for slid.- ing the said member, a brace mounted on the slidable member and receiving the screw, said brace being provided with a vertical socket, a pivotal support mounted in the socket, a horizontally-swinging member carried by the slidable member, and adjusting means mounted in the pivotal support and connected with the horizontally -swinging member.

28. In a machine of the class described, the combination with disk-holding means, of supporting means embodying a frame having guide-rods, a laterally-slidable mem ber mounted on the guide-rods, a horizontally-swinging member pivoted to the laterally-slidable member, a longitudinally-slidable member guided on the horizontally-swinging member, a vertically-swinging member supported by the longitudinally-slidable member, and means for adjusting the said members.

' 29. In a machine of, the class described, the combination with disk-holding means, of supporting means embodying a frame, a laterally-slidable member guided on the frame, a horizontally-swinging member pivoted to the slidable member, an arcuate bar mounted on the frame and receiving the horizontallyswinging member, and means for adjusting the said members.

In testimonythat I claim the foregoing as my own I have hereto afiixed my'signature in thepresence of two Witnesses.

CARL YOUNGSTROM.

Witnesses:

W. H. BEEDE, W. C. CHAPMAN. 

